US2861821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure actuated coupling
Assignee: Individual
•
Filing: 1956-05-29
•
Granted: 1958-11-25
•
Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 James R R Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:53
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1360588A
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US2025225A
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US2061062A
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US2396499A
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US2525037A
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US2568092A
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US2516758A
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GB668840A
Cited
US2736384A
Cited
US2724441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |